Add ToC to Export Your Schema page (#250)

Author: zach-carr

source/schema/export.txt

@@ -1,5 +1,14 @@
+==================
 Export Your Schema
-------------------
+==================
+
+.. default-domain:: mongodb
+
+.. contents:: On this page
+   :local:
+   :backlinks: none
+   :depth: 1
+   :class: singlecol
 
 You can export your schema after analyzing it. This is useful for 
 sharing your schema and comparing schemas across collections.
@@ -27,7 +36,7 @@ Once your schema has been analyzed, export your schema:
 Your schema is copied to your clipboard as a |json| object.
 
 Schema Object Properties
-~~~~~~~~~~~~~~~~~~~~~~~~
+------------------------
 
 Schema objects have ``count`` and ``fields`` properties:
 
@@ -137,7 +146,7 @@ Schema objects have ``count`` and ``fields`` properties:
        field.
 
 Example Schema
-~~~~~~~~~~~~~~
+--------------
 
 The following example uses a collection of 3 documents, each 
 with a ``sport`` field and unique information about that sport: